feat: ship v0.3.0 with P2.1 editor polish and P3 AI collaboration

Add chapter reorder, search replace, inspiration capture, and AI chat with context editing, settings, offline handling, and naming checks. Fix dev black screen by keeping process.env reads in the main process only.

Co-authored-by: Cursor <cursoragent@cursor.com>

tests/main/migrate-v3.test.ts

@@ -0,0 +1,54 @@
+import { describe, it, expect, afterEach } from 'vitest'
+import { DatabaseSync } from 'node:sqlite'
+import { migrate } from '../../src/main/db/migrate'
+import schemaV1 from '../../src/main/db/schema-v1.sql?raw'
+import schemaV2 from '../../src/main/db/schema-v2.sql?raw'
+import type { SqliteDb } from '../../src/main/db/types'
+
+function tableExists(db: SqliteDb, name: string): boolean {
+  const row = db.prepare("SELECT name FROM sqlite_master WHERE type='table' AND name=?").get(name)
+  return row != null
+}
+
+describe('migrate v3', () => {
+  let db: SqliteDb
+
+  afterEach(() => {
+    db?.close()
+  })
+
+  it('applies v3 on fresh database', () => {
+    db = new DatabaseSync(':memory:')
+    migrate(db)
+
+    expect(tableExists(db, 'ai_sessions')).toBe(true)
+    expect(tableExists(db, 'ai_messages')).toBe(true)
+
+    const version = db.prepare('SELECT MAX(version) AS v FROM schema_version').get() as { v: number }
+    expect(version.v).toBe(3)
+  })
+
+  it('migrates existing v2 database to v3', () => {
+    db = new DatabaseSync(':memory:')
+    db.exec(`CREATE TABLE IF NOT EXISTS schema_version (
+      version INTEGER PRIMARY KEY,
+      applied_at TEXT NOT NULL DEFAULT (datetime('now')),
+      description TEXT
+    )`)
+    db.exec(schemaV1)
+    db.exec(schemaV2)
+    db.prepare('INSERT INTO schema_version (version, description) VALUES (?, ?)').run(1, 'initial schema')
+    db.prepare('INSERT INTO schema_version (version, description) VALUES (?, ?)').run(2, 'P2 schema')
+
+    migrate(db)
+
+    const tables = db
+      .prepare("SELECT name FROM sqlite_master WHERE type='table' ORDER BY name")
+      .all() as { name: string }[]
+    expect(tables.map((t) => t.name)).toContain('ai_sessions')
+    expect(tables.map((t) => t.name)).toContain('ai_messages')
+
+    const version = db.prepare('SELECT MAX(version) AS v FROM schema_version').get() as { v: number }
+    expect(version.v).toBe(3)
+  })
+})